Re: [linux-lvm] Oops when running snapshots

["Heinz J . Mauelshagen" <mauelshagen sistina com>]

On Wed, Jul 09, 2003 at 04:26:36PM -0600, Andrew Patterson wrote:
> Ran a load test last night where we created snapshots two snapshots
> every 2 hours under heavy file system load.  We got the following oops:
> 
> 
> Unable to handle kernel NULL pointer dereference at virtual address
> 00000000
> 802895f5
<SNIP>
>   11:   89 48 04                  mov    %ecx,0x4(%eax)
> 
> 
> 10 warnings issued.  Results may not be reliable.
> 
> This was run on a 2.4.21 system using LVM 1.0.7.  The system has 2GB of
> memory and is configured with HIGHME64G.  We are running the latest
> 2.4.21 XFS and are using xfs_freeze to quiesce the file system.  We are
> not using the VFS_LOCK patch.
> 
> Anyone have any ideas what may be causing this?

VM problems ? (we had some reports ITR)
Do you have a chance to retest without HIGHMEM to see if it still fails ?

> 
> Thanks,
> 
> Andrew
> 
> -- 
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>    Andrew Patterson                          Voice:  (970) 898-3261
>    Hewlett-Packard Company                   Email:  andrew fc hp com
> 
> 
> 
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-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen Sistina com                           +49 2626 141200
                                                       FAX 924446
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